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- 1. Multiple Choice
Why should a pilot fly at a different airspeed for any given angle of attack to maintain lift in higher altitudes?
The air is more dense
The air is less dense
The air is warmer
The air is more humid
- 2. Multiple Choice
What do you need to do to maintain lift on a humid day in the middle of summer compared with a dry day in the middle of winter?
nothing
fly at a lesser velocity
fly at a greater velocity
decrease your angle of attack
- 3. Multiple Choice
Why is weight always directed toward the center of Earth?
because of the force of acceleration
because of the force of gravity
because of the force of lift
because of the friction of drag
- 4. Multiple Choice
What is NOT an aerodynamic force?
lift
drag
weight
mechanical
- 5. Multiple Choice
What is a gravitational force?
lift
weight
drag
thrust
- 6. Multiple Choice
What would cause an aircraft to decelerate until its airspeed no longer provides enough lift to support the plane in the air?
Drag is less than thrust
Thrust and drag are equal
Thrust is less than drag
Weight is greater than drag and thrust
- 7. Multiple Choice
Why does a pilot need to keep his or he angle of attack fairly high during low speed flights? A greater angle of attack:
generates a lift force equal to the aircraft's weight
increases thrust and airspeed
balances lift and thrust
increases airspeed
- 8. Multiple Choice
What type of drag concerns air stickiness and the boundary layer?
skin friction drag
interference drag
form drag
viscosity drag
- 9. Multiple Choice
What type of drag does balanced flight always include?
form
induced
interference
skin friction
- 10. Multiple Choice
How do vortices produce induced drag?
Air Flows above the tip and comes back in a downwash behind the wing, pulling down and back on the aircraft
A greater air pressure is created on the wing tops than on the bottom
Air passes over an aircraft's parts, hits one of these objects, then rejoins when it gets to the other side
Airplane surfaces meet at sharp angles, creating different air currents that collide and create drag
- 11. Multiple Choice
The motion of the airplane through the air depends on the relative strength and direction of the ___________________.
wind
four forces
angle of attack
aircraft velocity
- 12. Multiple Choice
What happens when the four forces are not in balance?
The aircraft cruises at constant velocity
The aircraft accelerates in the direction of the largest force
The aircraft decelerates rapidly while losing cabin pressure
More vortices will form
- 13. Fill in the Blank
Weight acts through a single point called the
- 14. Fill in the Blank
Sometimes when the angle of attack nears the stalling point, the _____________________ separates from the aircraft to create an even more unusual shape.
- 15. Multiple Choice
Gravitational forces are mechanical forces
True
False
- 16. Multiple Choice
Induced drag results from an airfoil developing lift.
True
False
- 17. Multiple Choice
Who is considered to be the Father of Modern Aviation?
Orville Wright
Samuel Langley
George Cayley
Otto Lilenthal
- 18. Multiple Choice
Which pioneer in aviation was criticized for spending too much time on powering his aircraft and not enough on controlling it?
John Montgomery
Samuel Langley
Orville Wright
George Cayley
- 19. Multiple Choice
Which pioneer of aviation spent his early life as a civil engineer working on bridges and roads and enjoyed aviation as a hobby?
Wilbur Wright
John Montgomery
Octave Chanute
Otto Lilenthal
- 20. Multiple Choice
Which pioneer of aviation, grew up in Dayton OH working in a bicycle shop began perfecting his wing shapes by using a wind tunnel?
Orville Wright
George Cayley
Samuel Langley
John Montgomery
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